Omit default parameters for reference types

crates/ra_hir_ty/src/display.rs

@@ -9,7 +9,7 @@ pub struct HirFormatter<'a, 'b, DB> {
     fmt: &'a mut fmt::Formatter<'b>,
     buf: String,
     curr_size: usize,
-    max_size: Option<usize>,
+    pub(crate) max_size: Option<usize>,
     omit_verbose_types: bool,
 }
 

crates/ra_hir_ty/src/lib.rs

@@ -855,7 +855,12 @@ impl HirDisplay for ApplicationTy {
             }
             TypeCtor::Ref(m) => {
                 let t = self.parameters.as_single();
-                write!(f, "&{}{}", m.as_keyword_for_ref(), t.display(f.db))?;
+                let ty_display = if f.omit_verbose_types() {
+                    t.display_truncated(f.db, f.max_size)
+                } else {
+                    t.display(f.db)
+                };
+                write!(f, "&{}{}", m.as_keyword_for_ref(), ty_display)?;
             }
             TypeCtor::Never => write!(f, "!")?,
             TypeCtor::Tuple { .. } => {

crates/ra_ide/src/inlay_hints.rs

@@ -245,6 +245,7 @@ struct Test<K, T = u8> {
 
 fn main() {
     let zz = Test { t: 23, k: 33 };
+    let zz_ref = &zz;
 }"#,
         );
 
@@ -255,6 +256,11 @@ fn main() {
                 kind: TypeHint,
                 label: "Test<i32>",
             },
+            InlayHint {
+                range: [105; 111),
+                kind: TypeHint,
+                label: "&Test<i32>",
+            },
         ]
         "###
         );
@@ -374,6 +380,7 @@ fn main() {
 
     let multiply = |a, b, c, d| a * b * c * d;
     let _: i32 = multiply(1, 2, 3, 4);
+    let multiply_ref = &multiply;
 
     let return_42 = || 42;
 }"#,
@@ -417,7 +424,12 @@ fn main() {
                 label: "i32",
             },
             InlayHint {
-                range: [201; 210),
+                range: [200; 212),
+                kind: TypeHint,
+                label: "&|…| -> i32",
+            },
+            InlayHint {
+                range: [235; 244),
                 kind: TypeHint,
                 label: "|| -> i32",
             },